40.19% is the change from 642 to 900
Calculation steps:
[( 900 - 642 ) ÷ 642] x 100 = 40.19%
Formula
Percentage change = [(900 - 642) / 642] x 100
Subtract the new number by the original number
900 - 642 = 258
258 ÷ 642 = 0.40186915887850466
0.40186915887850466 x 100 = 40.19%